<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card class="box-card">
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="10">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="dialogVisible=true">添加用户</el-button>
                </el-col>
            </el-row>
            <!-- 用户列表区域 -->
            <el-table :data="userList" border stripe>
                <el-table-column type='index'></el-table-column>
                <el-table-column prop="username" label="姓名"></el-table-column>
                <el-table-column prop="email" label="邮箱"></el-table-column>
                <el-table-column prop="mobile" label="电话"></el-table-column>
                <el-table-column prop="role_name" label="角色"></el-table-column>
                <el-table-column label="状态">
                    <template slot-scope="scope">
                        <el-switch v-model="scope.row.mg_state" @change="switchChange(scope.row)"></el-switch>
                    </template>
                </el-table-column>
                <el-table-column  label="操作">
                     <template slot-scope="scope">
                         <!-- 修改按钮 -->
                         <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)"></el-button>
                         <!-- 删除按钮 -->
                         <el-button type="danger"  size="mini" icon="el-icon-delete" @click="removeInfo(scope.row.id)"></el-button>
                         <!-- 分配角色按钮 -->
                         <el-tooltip  effect="dark" content="分配角色" placement="top-start" :enterable="false">
                            <el-button type="warning" size="mini" icon="el-icon-setting" @click="setRole(scope.row)"></el-button>
                         </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>
            <!-- 分页区域 -->
             <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[1, 2, 4, 10]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加用户的对话框 -->
        <el-dialog title="添加用户" :visible.sync="dialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区 -->
            <el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="70px">
              <el-form-item label="用户名" prop="username">
                <el-input v-model="addForm.username"></el-input>
              </el-form-item>
              <el-form-item label="密码" prop="password">
                <el-input v-model="addForm.password"></el-input>
              </el-form-item>
              <el-form-item label="邮箱" prop="email">
                <el-input v-model="addForm.email"></el-input>
              </el-form-item>
              <el-form-item label="手机" prop="mobile">
                <el-input v-model="addForm.mobile"></el-input>
              </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户的对话框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <!-- 内容主体区 -->
            <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="70px">
              <el-form-item label="用户名">
                <el-input v-model="editForm.username" disabled></el-input>
              </el-form-item>
              <el-form-item label="邮箱" prop="email">
                <el-input v-model="editForm.email"></el-input>
              </el-form-item>
              <el-form-item label="手机号" prop="mobile">
                <el-input v-model="editForm.mobile"></el-input>
              </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配角色的对话框 -->
        <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%"
        @close="setRoleDialogClosed">
          <div class="assign">
            <p>当前的用户：{{userInfo.username}}</p>
            <p>当前的角色：{{userInfo.role_name}}</p>
            <p>分配新角色：
                <el-select v-model="seleetedRoleId" placeholder="请选择">
                  <el-option
                    v-for="item in rolesList"
                    :key="item.id"
                    :label="item.roleName"
                    :value="item.id">
                  </el-option>
              </el-select>
            </p>
          </div>
          <span slot="footer" class="dialog-footer">
            <el-button @click="setRoleDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
          </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    // 验证邮箱的规则
    var checkEmail = (rule, value, cb) => {
      // 验证邮箱的正则表达式
      const regEmail = /^\w+((-\w+)|(\.\w+))*@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/
      if (regEmail.test(value)) {
        // 合法的邮箱就return
        return cb()
      }
      cb(new Error('请输入合法的邮箱'))
    }
    // 验证手机号的规则
    var checkMobile = (rule, value, cb) => {
      // 验证手机号的正则表达式
      const regMobile = /^[1][3,4,5,7,8][0-9]{9}$/
      if (regMobile.test(value)) {
        return cb()
      }
      cb(new Error('请输入合法的手机号'))
    }
    return {
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 2
      },
      userList: [],
      total: 0,
      // 控制添加用户对话框的显示与隐藏
      dialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: [],
      // 所有角色的数据列表
      rolesList: [],
      // 已选中的角色Id值
      seleetedRoleId: ''
    }
  },
  created () {
    this.getUserList()
  },
  methods: {
    async getUserList () {
      const { data: res } = await this.$http.get('users', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取用户列表失败！')
      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听 pagesize改变的事件
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听 switch 开关状态的改变
    async switchChange (userInfo) {
      const { data: res } = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`)
      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error('更新用户状态失败！')
      }
      this.$message.success('更新用户状态成功！')
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('用户创建失败')
        this.$message.success('添加用户成功')
        // 隐藏对话框
        this.dialogVisible = false
        // 重新获取用户列表数据
        this.getUserList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`users/${id}`)
      if (res.meta.status !== 200) return this.$message.error('查询用户信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(`users/${this.editForm.id}`, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })
        if (res.meta.status !== 200) return this.$message.error('修改用户信息失败')
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList()
        this.$message.success('修改成功')
      })
    },
    // 删除id删除对应的用户信息
    removeInfo (id) {
      this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete(`users/${id}`)
        if (res.meta.status !== 200) {
          this.$message.error('删除失败')
        } else {
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          this.getUserList()
        }
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    // 展示分配角色的对话框
    async setRole (userInfo) {
      this.userInfo = userInfo
      // 在展示对话框之前，获取所有角色的列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 点击按钮，分配角色
    async saveRoleInfo () {
      if (!this.seleetedRoleId) {
        return this.$message.error('请选择要分配的角色')
      } else {
        const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.seleetedRoleId })
        if (res.meta.status !== 200) return this.$message.error('分配角色失败')
        this.$message.success('更新角色成功')
        this.getUserList()
        this.setRoleDialogVisible = false
      }
    },
    // 监听分配角色对话框的关闭事件
    setRoleDialogClosed () {
      this.seleetedRoleId = ''
      this.userInfo = {}
    }
  }
}
</script>

<style scoped>
.el-breadcrumb{
    margin-bottom: 15px;
    font-size: 12px;
}
.el-card{
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15) !important;
}
.el-table{
    margin-top: 15px;
}
.el-pagination{
    margin-top: 15px;
}
.assign p{
  margin-bottom: 15px;
}
</style>
